They are similar because they both show that if you have parenthesis with different numbers in them, they can be swapped around and switched with each other to be equal with a different type of switch.
The pie grid is out of 100%. When you add 10%, 25% and 40% you get 75%. Subtract 100% and 75% and you get the answer of 25%.
Given P=$3000
R=10%
And double of P means A=$6000
Now , we know that
A = P×R×t÷100
6000=3000×10×t÷100
6000×100÷30000 =t
20=t
The Answer is 20 Yrs if rate was for year
The answer is B $11.50 per hour